Mono
Mono is a Shopify theme by Slash Themes ($300). Tested on 2026-09-11 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 75 for mobile speed and 94 for desktop speed, 92/92 for SEO and 93/92 for accessibility (mobile/desktop, 0–100). Those are medians across its 4 tested presets; mobile speed across every tested page ranges from 61 to 97. On its marketplace it is rated 4.9 out of 5 from 119 reviews.
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 75 | 94 |
| SEO | 92 | 92 |
| Accessibility | 93 | 92 |
| Best practices | 91 | 91 |
Median of 4 presets · measured 24 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Folk home page
Mobile
Speed 69 · 31 points to gain
- −25 Largest Contentful Paint medium effort
- −3.3 First Contentful Paint medium effort
- −2.3 Speed Index medium effort
- 300 ms Reduce unused JavaScript high effort
SEO 92 · 8 points to gain
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 89 · 11 points to gain
- −4.7 Image elements do not have `[alt]` attributes low effort
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 `<frame>` or `<iframe>` elements do not have a title low effort
Best practices 73 · 27 points to gain
- −19.2 Uses third-party cookies high effort
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Desktop
Speed 80 · 20 points to gain
- −9.3 Total Blocking Time medium effort
- −5.8 Largest Contentful Paint medium effort
- −5.2 Speed Index medium effort
SEO 92 · 8 points to gain
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 86 · 14 points to gain
- −4.6 Image elements do not have `[alt]` attributes low effort
- −3.2 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.2 `<frame>` or `<iframe>` elements do not have a title low effort
- −3.2 Touch targets do not have sufficient size or spacing. medium effort
Best practices 73 · 27 points to gain
- −19.2 Uses third-party cookies high effort
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Clay demo ↗ | 73 | 92 | 93 | 96 | 92 | 93 | 2026-09-11 |
| category ↗ | 78 | 92 | 100 | 94 | 92 | 100 | 2026-09-11 |
| home ↗ | 74 | 85 | 83 | 99 | 85 | 83 | 2026-09-11 |
| product ↗ | 67 | 100 | 95 | 96 | 100 | 95 | 2026-09-11 |
| Mono demo ↗ | 86 | 95 | 93 | 96 | 95 | 91 | 2026-09-11 |
| category ↗ | 97 | 100 | 97 | 99 | 100 | 93 | 2026-09-11 |
| home ↗ | 88 | 85 | 85 | 94 | 85 | 82 | 2026-09-11 |
| product ↗ | 72 | 100 | 97 | 96 | 100 | 97 | 2026-09-11 |
| Folk default demo ↗ | 68 | 92 | 94 | 91 | 92 | 92 | 2026-09-11 |
| category ↗ | 75 | 92 | 100 | 97 | 92 | 97 | 2026-09-11 |
| home ↗ | 69 | 92 | 89 | 80 | 92 | 86 | 2026-09-11 |
| product ↗ | 61 | 92 | 92 | 95 | 92 | 92 | 2026-09-11 |
| Tiny demo ↗ | 76 | 90 | 91 | 81 | 90 | 91 | 2026-09-11 |
| category ↗ | 83 | 92 | 97 | 69 | 92 | 97 | 2026-09-11 |
| home ↗ | 70 | 85 | 85 | 80 | 85 | 83 | 2026-09-11 |
| product ↗ | 75 | 92 | 92 | 95 | 92 | 92 | 2026-09-11 |
Show this score on your site
A live badge: it always shows Mono's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/mono"><img src="https://themestested.com/badge/shopify/mono.svg" alt="Mono speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.